Pawl and ratchet.



TINITED STATES PATENT ortion.

JOHN s. FLETCHER, or MOUND crrY, KANSAS.

PAwL AND RATOHETl Specification of Letters Patent.

Patented March 13, 1906.

To all whom it may concern:

Be it known that '1, JOHN S. FLETo11E'R, a citizen of the United.States, residing at Mound City, in the county of Linn and State ofKansas, have invented new and useful Improvements in Pawlsand Ratchets,of which the following is a s ecification.

My invention re ates to new and useful imrovements in pawl-and-ratchetmechanism or use in connection with drills and. other tools to berotated; and its object is to proand a locking device is also employedfor holdin the pawls so as to permit the tool to be use as asingleratchet.

The invention also consists in-the further novel construction andcombination of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, showing the preferred form ofmy invention, and in which c Figure 1 is a plan view of the mechanismused as a double ratchet. Fig. 2 is a horizontal section through theframe thereof and showing the pawls in section. Fig. 3 is an endelevation of the mechanism, a ortion of the handle and drill beingremove ,Fig. 4 is a horizontal'sectionthrough the pawl and showingtheparts locked to form a single t e ratchet, and Fig.;5- is a sideelevation of pawl with the parts in the positions shown in Referring tothe figures by numerals of reference, 1 is ayoke having a handle 2 atone endthereof, while in the other'end is revolubly mounted a ratchet-wheel'3. Ears 'extend from thesides of yoke 1, and to theseearsispivoted a forkedend of a plate 5 A yoke 6 is loosely mounted'atopposite sides of the wheel 3 and within the yo e land is-connected toone end of plate 5 bymeans of rods 7. A spring-pressed pawl 8 is pivotedwithin the yoke 6 and normally contacts with the ratchet-wheel 3. A yoke9 is also arranged within the yoke 1 and extends to opposite sides ofthe ratchet-Wheel 3, and this yokehas a detachable handle 10 at theouter-end thereof. A s ring-pressed pawl 11 is also within the yo e 9and normally bears upon the ratchet-wheel 3, and rods 12 are pivoted atopposite ends to the sides of yoke 9 and to the central portion oftheplate 5.

With the mechanism herein described it Will be seen that by grasping thehandle 2' in one hand and oscillating the handle 10 back ward andforward the pawls 8 and 11 will be caused to alternately engage and slipoverthe teeth of the ratchet-wheel 3. In other words, when the handle 10is moved in the direction of the arrow in Fig. 2 the pawl 11 will engagethe teeth of the ratchet-wheel, while the pawl 8 will be slippedbackward thereover, such movement being imparted thereto through therods 12, plate 5, and rods 7. When the handle 10 is moved in theopposite direction,

be seen that by lacing a drill 14 within the ratchet-wheel 3 t e samewill be caused to 1'0- tate practically continuously in one direction bymeans of this mechanism:

In Figs. 4 and 5 I have shown the mechananism locked to form a singleratchet; This is done by removing the handle 10 from the yoke 9, therebyexposing the stem 15, which extends from the yoke. at the end of a rod'17, is then placed upon the stem 15, and a hook 18, formed at the otherend of the rod 17, is placed in engagement with a pin '19, which extendsthrough the plate 5 and forms the pivot of the rods'7.

"Withthis arrangement the yoke 1 can be oscillated backward and forwardand the two pawls are caused to operate in unison.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am aware thatmodifications may be made therein Without departing from the spirit orsacrificingany of the advantages thereof, and I therefore reserve theright to make such changes as fairly fall within the scope of myinvention.

Having thus fully described the invention, what is claimed as new is Aneye 16, formed.-

. this operation will be reversed. It will thus 1 In mechanism of thecharacter described,

. the combination with a yoke having aratchetwheel journal'ed therein;of oppositely: dis posed yokes extending to opposite sides of theratchet-wheel and pivoted Within the firstmentioned yoke, pawls" withinthe oppositelyarranged yokes and normally contacting with theratchet-wheel, aplate pivoted within the first-mentioned yoke, rodsconnecting one end of'the plate with one of the yokes. and

rods connecting the central portion of said I plate with the other yoke.

2. Inmechanism of the character described, the combination with a yokehaving aratchetwheel j ournaled therein of oppositelyarranged yokes,pawls therein normally engaging the ratchet-wheel, a plate pivoted tothe first-mentioned yoke, and rods connecting the plate with the yokes,whereby the pawls are adapted to be moved alternately into engagementwith the'ratchet-wheel.

3. In mechanism of the character described, the combination with a yokehaving aratchetwheel journaled therein; of oppositelydisposed yokespivoted within the firstmentioned yoke and adapted to be folded there-.upon, pawls therein normally engaging the ratchet-wheel, a platepivoted to the firstmentioned yoke, rods connecting the plate with theyokes, whereby the pawls are adaptedto be moved alternately intoengagement with the ratchet-wheel, and means for looking the yokes infolded position.

4. In mechanism of the character described, the combination with a yokehaving a handle at one end and a ratchet-wheel j ournaled in the otherend; of a second yoke pivoted adj acent the ratchet-wheel and having adetachable handle, a pawl pivoted therein and normally engaging theratchet-wheel, rods extending from the yoke, a plate pivoted in thefirst-mentioned yoke and connected between its ends to the rods, anotheryoke pivoted adjacent the ratchet-wheel, a pawl therein normallyengaging the ratchet-wheel, and rods plivoted to said yoke and to oneend of the ate.

p 5. In a mechanism of the character described, a supporting-yoke, aratchet-wheel journaled therein, operating-yokes connected with thesupporting-yoke, pawls carried by the operating-yokes and arranged tooppositely engage the ratchet-wheel, and a lever mechanism connectingthe operating-yokes whereby when one of the operating-yokes isreciprocated the other will be reciprocated therewith and cause thepawls to continuously revolve the ratchet-wheel.

6. In a mechanism of the character described, a supporting-yoke, aratchet-wheel journaled therein, operating-yokes connected with thesupporting-yoke, means carried by said operating-yokes to continuouslyrevolve the ratchet-wheel when said yokes are reciprocated, and meanswhereby to vary the ar rangement of said operating-yokes to adapt saidmeans to intermittently revolve the ratchet-wheel.

7. In a mechanism of the character described, a supporting member, aratchetwheel journaled therein, reciprocating 0 )erating means engagingthe ratchet-wheel on opposite sides, mechanism connecting saidrespective operating means whereby to con tinuously revolve the ratchetin the reciprocation of said means, said operating means being variableas to position to effect intermittent driving of the ratchet duringreciprocation of the means.

8. In a mechanism of the character described, a supporting member, aratchetwheel journaled'therein, reciprocating operating means engagingthe ratchet-wheel on opposite sides, mechanism connecting saidrespective operating means whereby to continuously revolve the ratchetin the reciprocation of said means, said operating means beingchangeable as to position to permit intermittent driving of the ratchetduring reciprocation of the means, and means for looking the operatingmeans in its changed position.

9. In a mechanism of the character described, a supporting member, aratchetwheel journaled therein, reciprocating operating devices foralternately engaging and imparting continuous motion to theratchetwheel, and means adapting said devices to simultaneously engagethe ratchet-wheel and impart intermittent motion thereto.

10. In a mechanism of the character described, a rotary member,operating means to alternately engage and continuously rotate saidrotary member, and means to vary the action of said operating means tosimultaneously engage and effect an intermittent rotation of said rotarymember.

11. In a mechanism of the character described, a ratchet-wheel,reciprocating operating devices provided with pawls to engage saidratchet-wheel, means for connecting and disposing said devices to adaptthe pawls to alternately engage and continuously rotate the wheel, saidmeans being adapted to permit said devices to fold or approach and causesaid pawls to simultaneously engage and intermittently rotate theratchet-wheel, and means for retaining said devices in folded position.

12. A ratchet-wheel, two pawls, and means to cause the pawls toalternately engage and continuously rotate the ratchet-wheels, or tosimultaneously engage and intermittently rotate said ratchet-wheel.

In testimony whereof I am my signature in presence of two witnesses,

JOHN S. FLETCHER.

Witnesses:

W. C. FLETCHER, A. J. C. LowE.

